Ventilator.



' -1 Io.'861 ,872. I PATENTED JULY 30, 1907, R.'MAGDONALD.

VENTILATOR.

APPLICATION FILED APB; 1a, 1000.

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UNITED STATES RODERICK MACDONALD, OF GLAOEBAY, NOVA SOOTIA, CANADA.

VENTILATOR.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed April 18,1906. $erial No. 312,491.

To all whom it may concern:

Be it known that I, RODERICK MACDONALD, a citizen of the United States, residing at Glace Bay, in the Province of Nova Scotia, Dominion of Canada, have invented certain new and useful Improvements in Ventilators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to ventilators for dwellings or buildings, employed for any purpose where the invention is needed and can be used.

The purpose of the invention is to construct and use a ventilator in connection with a skylight, built upon a roof. The frame of the structure is substantially square, in horizontal section, while the depth is somewhat greater than the breadth or what might be considered as the length. Inasmuch as the structure will be employed as a skylight, as stated, its top and sides will consist of glass so far as may be desirable, and the framework proper may consist of steel or other metal in order to render it fire-proof, though it might be composed of wood.

The two essential propositions of an efficient ventilator, that of expelling or drawing out the foul vitiated air and replacing it with fresh pure air, are secured by opening the ventilator on at least two sides, so that the warm vitiated air may rise and pass out through one opening while a current of pure fresh air enters at the opening in the opposite side.

The nature of the invention has been so far disclosed in the foregoing statements as to need no further explanation and mode of operation is shown in the annexed drawings, forming a part of the specification, and it will be first described in detail, in view of the said drawings, and then be pointed out in the subjoined claims.

Of the drawingsz-Figure 1 is a side elevation of the ventilator showing it as closed. Fig. 2 is a similar view showing it open. Fig. 3 is a horizontal section. Fig. 4 is a vertical sectional view taken on a line running centrally through the structure.

Like characters designate like parts or features as the case may be, wherever they occur.

Inthc drawings, 5 designates the framework, which as already stated, may be of steel to receive plates of glass or other vitreous substance suitably framed to admit light. The top 7 of the structure may be flat and the sides vertical and the former is stationary, while a central rectangular part 8, of each side is made to be opened and closed as a window or door, being hinged at its upper edges, as at 9 to a stationary part of the structure and controlled by rods 10 or ropes '11 and pulleys 12. The hinges may be composed of two simple leaves joined at one edge of a pintle, as is common, and

having one leaf secured to a stationary part of the other to the window or door that is to be moved to open or shut it.

When rods 10 are employed for the medium for opening and closing the window, said rods will be pivoted at their upper ends to lugs 13 formed on a plate 14 secured to the inside of thewindow or door 8, and at their lower ends to a short cross-bar 15 at the bottom of the structure near the center thereof. Any suitable means for fastening the window at its lower edge may be employed, and when the fastening devices are released by raising the said cross-bar 15, the rods, which are slightly curved inward will be raised, their upper ends swinging the windows 8 outward on their hinges and holding them in this position, as shown in Fig. 2, until it may be desired to close them, when the rod 17, which forms an integral part of the cross-bars 15, may be drawn down, pulling the lower portions of the hinged doors inward through the medium of the rods 10, and closing the said doors, as shown.

When a rope and pulleys are used for opening or assisting to open the windows, there will be a small pulley l3 hung from a bracket centrally disposed at and secured to the top of the framework, inside, and a rope 11 attached at one end to said pulley-bracket is led down around another pulley 12 supported on suitable means connected with the top of the cross-bars, as shown in Fig. 4, and is thence led up to and over the pulley 13 first mentioned, and thence down to the handle 18 of the rod 17, to which handle the other end of the rope may be connected so as to be in convenient position for use. In this instance, by drawing down on the lower end of the rope, and lifting upward on the handle 18 of the rod 17 the doors 8 will be opened through the medium of the rods 10, as before described, and the said doors may be held'open by securing the lower end of the rope to the handle 18 or any stationary object. When the doors are closed, which may be accomplished by their own gravity upon loosening the lower end of the rope, the rope may be held to control the letting down of the doors to prevent slamming.

By the means described a very efficient and satisfactory skylight ventilator may be constructed and utilized.

In mentioning the part 8 it will be understood to comprise a window or a door which ever may be employed, since either may be used according to construction and place.

It will be understood that with the rods 10 cross-bar 15 and rod 17 only two opposing windows or doors 8 may be controlled or all four will be operated. Of course, when the curved rods are used alone, as it is seen they may be, as, for example, when it is desired to use but two opposing doors or windows, the rope and pulley will not be needed and may be dispensed with.

What is clainied is A skylight and ventilator consisting of a substantially square structure having a flat top and a ventilating door in each of the four vertical sides, hinged at its upper edge and adapted to swing outward at its free edge, combined with inwardly and downwardly curved rods pivoted at their upper ends on the inner sides of said doors, crossbars below the structure on which the lower ends of the curved bars are pivoted, a vertical rod with which said cross-bars are connected, and a handle on the lower end 01.

- said rod, a bracket connected centrally on the inside at the top of the structure, a pulley supported from said bracket, a second pulley supported on the top of the cross-bars, a rope connected at one end with the bracket at the top of the structure, extending down and passed about the pulley on the top of the cross-bars, thence passed up and around the pulley supported from the bracket at the top of the structure, and thence led down to the handle of the vertical rod.

In testimony whereof, I afiix my signature, in presence of two witnesses. v

RODERICK MACDONALD.

Witnesses:

COLIN F. McNEILL, JAMES .ToHNs'roN. 

